Armature for electric motors



(No Model.)

0. J. VAN DEPOELE. ARMATURE FOR ELECTRIC MOTORS.

No. 461,296. Patented Oct. 13,1891.

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UNITED STATES PATENT OFFICE.

CHARLES J. VAN DEPOELE, OF CHICAGO, ILLINOIS.

ARMATU RE FOR ELECTRIC MOTORS.

SPECIFICATION forming part of Letters Patent No. 461,296, dated October13, 1891.

Application filed April 7, 1891.

T0 aZZ whom it may concern:

Be it known that I, CHARLES J. VAN DE- POELE, a citizen of the UnitedStates, residing at Chicago, in the county of Cook, State of Illinois,haveinvenied certain new and useful Improvements in Electro-DynamicMotors, of which the following is a description.

My invention relates to improvements in electro-dynamic motors, theconstruction, arrangement, and operation of which will be fullyhereinafter described, and pointed out in the appended claims.

In the accompanying drawings, illustrating my invention, Figure 1 is aview in elevation, showing the field-magnets partly broken away, and inwhich several successive layers of the armature have been removed toshow its interior construction. Fig. 2 is a plan view similar to Fig. 1,parts of the armature being broken away to show its interiorconstruction. Fig. 3 is a view in elevation, showing a motor embodyingmy invention.

Similar letters denote like parts throughout.

As indicated in the drawings, my improved motor is designed to operatewith a four-pole field-magnet, the polar extensions being indicated at AA A A the outer ends of the cores of the field-magnets a a a a beingattached to and supported by an inclosingiron ring or shell B. Thefield-magnets a a a a are formed of coils of insulated conductor, woundupon iron cores in the usual manner.

In the construction of the armature the core C is preferably composed ofone or more foundation-rings D, of soft iron, upon which is woundgalvanized-iron wireE until the desired thickness is reached, the wire Ebeing secured by soldering at desirable points.

The inducing conductor of which the armature-coils F are formed is ofthe usual insulated copper wire wound in separatedcoils, as in what isknown as the Pacinotti armature. Between each two successivearmature-coils is interposed ablock, strip, or piece of iron G, which isof a shape to fit squarely between the coils and of the same depth asthe total thickness of each coil, so that the outer coils and the facesof the blocks G form a substantially even peripheral surface. The

blocks G may be secured to the core by bolts or screws passing throughsaid blocks and Serial No. 387,922. (No model.)

into the core, or they may be held in place by the winding during themanufacture of the armature, being permanently secured by screws passinginto their ends from outer disks or plates hereinafter referred to. Theblocks taper somewhat toward the core C, so that the channels or spacesfor the coils are of even width throughout. Small pieces g of metal orwood'extend from the inner circumference of the core C, so that thecoils F may be separated on the interior as well as 011 the exterior ofsaid ring, and at the same time to render the divisions between thearmaturesections of even size throughout and thereby prevent crowding ofthe wires on the interior of the ring and promoting facility andperfection of manufacture. In order to still further prevent crowding onthe interior of the ring and the irregular displacement of aconsiderable portion of the winding, as is necessary to carry the samearound the spiders usually employed to support the armature upon itsshaft, I provide supporting-disks II, which are attached on the exteriorof said armature after the winding is completed, and desirably by meansof screws h, passing through said disks and into the ends of the ironblocks G, thus completely inclosing the winding and protecting it fromaccidental injury, as also from contact with dirt, dust, and otherobjectionable matter. As shown, the plate H is centrally apertured topermit the circulation of currents of air on the interior; but this isnot essential, and the said plate H may be imperforate, if desired. Theplates H may be of any diamagnetio material and are supported upon andsecured to the armature-shaft I by re-enforeed or thickened portions h.As indicated in Fig. 3, the armature-shaft I is provided with a suitablecommutator J, upon which rest four brushes j 7' It will be entirelyobvious, however,

that I am not confined to he use of a fourpole field-magnet or four commutator-brusl'ies, and that the armature of my improved motor, beingconstructed as described, may be operated with any other novel ordesirable fieldthe supporting-disks II, which may be of vulcanized fiberor similar material, maybe employed without the iron blocks G, blocks ofinsulating material or diamagnetic metal being substituted as supportsfor said disks, thus providing improved means for supporting armaturesand one that provides an entirely unobstructed interior for greaterfacility of winding.

\Vhen the armature, as described, is completed, the periphery is coveredwith one or more layers of iron wire K, forming and constituting amagnetic envelope therefor, and, in connection with said exteriorwinding,the magnetic separating-blocks G form a necessary part of thepresent invention. I have found that with such construction an armatureis produced which, when employed in an electro-dynamic motor, requiresvery much less power to drive it, and is therefore of higher efficiencyfor such work.

Having described my invention, what I claim,'and desire to secure byLetters Patent, is-

1. In an electro-dynamic motor, an armature the sections of which arespaced by separating blocks or strips and which is enveloped by anexterior winding or covering, also of magnetic metal, substantially asdescribed.

2. An electro-dynamic motor having an armature wound in sections thesections being separated by blocks or strips extending from theperiphery of the core to the circumference of the armature, separatingthe sections of winding, and an exterior metallic winding or coveringinclosing the armature, substantially as described.

3. An armature for electro-dynamic motors, comprising a core formed ofan iron ring or rings covered with one or more layers of galvanized-ironwire, iron strips or blocks extending from or attached to the peripheryof said core and forming separate symmetrical channels for the windingof the sections, and an iron covering or winding covering the exteriorof the coils and iron blocks, substantially as described.

4. An armature for electro-dynamic machines, comprising a core, a seriesof separating blocks or extensions not integral with the core andbetween which the inducing-conductor is wound, and plates or diskssecured to the ends of the separating-blocks and adapted to be mountedupon and to support the armatureupon its shaft, substantially asdescribed.

5. An armature for electro-dynamic motors, comprising a core, a seriesof separating blocks or strips not integral with the core and betweenwhich the inducingconductor is wound in sections, and inelosing platesor disks secured to the ends of the separatingblocks and adapted to bemounted upon and to support the armature upon its shaft, substantiallyas described.

6. An armature for electro-dynamic motors, comprising a shaft, two disksor plates of non-magnetic material secured upon said shaft, anarmati'ire-core having sectional winding thereon, independent divisionalblocks between the sections of conductor, and connections between theends of the blocks and the plates upon the armature-shaft for sustainingthe armature in operative position, substantially as described.

In testimony whereof I hereto affix mysignature in presence of twowitnesses.

CHARLES J. VAN DEPOELE.

Witnesses:

W. A. STILns, JOHN EASON.

